Probably closer to $50/copy if you can find one. The estimated backlog is 1,000,000. That is if you want a magazine.
I will guarantee you he wasn’t holding a clip. A clip is the dohicky that stores multiple rounds of ammunition to speed up insertion into a magazine or cylinder. A magazine is the dohicky that stores ammunition and feeds it to the chamber for firing. I made that mistake in basic and did lots of aerobic exercise learning the difference.